package collection;


import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

class CollectionUtils{

    public static <ABC extends  Number> void sort1(List<ABC> list){

    }

    public static  void sort2(List< ? super Integer> list){
    }
}
/**
 * @Author Justin Parker
 * @Date 2024/7/15 0015 10:29
 * @Version 1.0
 */
public class GenericDemo01 {

    public static void main(String[] args) {
        List<Integer> list =new ArrayList<Integer>();

        CollectionUtils.sort2(list);


    }


}
